Trimbach is a municipality in the district of Gösgen in the canton of Solothurn in Switzerland.

[3] Trimbach has an area, as of 2009[update], of 7.62 square kilometers (2.94 sq mi).

Of the rest of the land, 1.81 km2 (0.70 sq mi) or 23.8% is settled (buildings or roads), 0.08 km2 (20 acres) or 1.0% is either rivers or lakes.

[4] The municipality is located in the Gösgen district, between the Aare river and the Hauenstein Pass.

It consists of the village of Trimbach and the settlements and individual houses of Rumpel, Miesern, Mahrenacker, Erlimoos and Frohburg.

[5] The blazon of the municipal coat of arms is Argent a Rose Gules barbed and seeded proper.

[9] Most of the population (as of 2000[update]) speaks German (4,947 or 80.1%), with Italian being second most common (430 or 7.0%) and Turkish being third (178 or 2.9%).

[8] The age distribution, as of 2000[update], in Trimbach is; 479 children or 7.8% of the population are between 0 and 6 years old and 958 teenagers or 15.5% are between 7 and 19.

[9] The historical population is given in the following chart:[3][14] The Ruins of Frohburg Castle (from the 12th-14th Century) are listed as a Swiss heritage site of national significance.

[15] In the 2007 federal election the most popular party was the SVP which received 28.23% of the vote.

In the federal election, a total of 1,564 votes were cast, and the voter turnout was 45.8%.

[9] There were 3,054 residents of the municipality who were employed in some capacity, of which females made up 43.9% of the workforce.

The number of jobs in the primary sector was 20, of which 17 were in agriculture and 3 were in forestry or lumber production.

In the tertiary sector; 199 or 12.3% were in wholesale or retail sales or the repair of motor vehicles, 80 or 4.9% were in the movement and storage of goods, 68 or 4.2% were in a hotel or restaurant, 2 or 0.1% were in the information industry, 5 or 0.3% were the insurance or financial industry, 90 or 5.5% were technical professionals or scientists, 87 or 5.4% were in education and 1,015 or 62.5% were in health care.

[9] From the 2000 census[update], 2,680 or 43.4% were Roman Catholic, while 1,563 or 25.3% belonged to the Swiss Reformed Church.

The education system in the Canton of Solothurn allows young children to attend two years of non-obligatory Kindergarten.

212 lower secondary students attend school in Trimbach.